$pre_str=Referring Hospital;

[download]
doesn't do what you think it does. It calls the method 'Referring' in the package 'Hospital'. (Which will die if that method cannot be found).

Perhaps you miss cut-and-paste? But then, if you did, you're showing us different code that you have a problem with. Can you post some runnable code that doesn't do what you expect it to do?

In reply to Re: Help with substitution by JavaFan
in thread Help with substitution by tej

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